Added the field name to all CodedOutputStream.Write??? calls
Refactored 'speed' generated write of arrays to call Write???Array.  This may
have impacted speed write speeds for arrays of non-reference types due to the
use of non-generic IEnumerable and the subsequent boxing of value types.  This
could be addressed later if desired.
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs
index f06354a..9a29d41 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs
@@ -73,7 +73,7 @@
     public override void WriteTo(pb::CodedOutputStream output) {

       int size = SerializedSize;

       if (HasD) {

-        output.WriteInt32(1, D);

+        output.WriteInt32(1, "d", D);

       }

     }